Add spine and dialogic museums

docs/museums/dialogic/start_timeline.dtl

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+# ============================================================
+# Dialogic 2 Test Timeline — Feature Showcase
+# ============================================================
+# Characters available:
+#   Miko     — portraits: neutral, smile, joy, anger, shock
+#   Advisor  — portraits: pl5, blink, doubt, surprise
+#   Merchant — portraits: happy, blink, surprise, confusion
+# ============================================================
+
+# ---- SETUP: Variables --------------------------------------
+set {coins} = 0
+set {player_has_key} = false
+set {met_merchant} = false
+
+# ---- LABEL: opening ----------------------------------------
+label opening
+
+# Join both main characters at the start
+join Miko center
+join Advisor right
+
+Miko (joy): Welcome to the Dialogic 2 Test Timeline!
+Advisor (pl5): This timeline showcases all major Dialogic features.
+
+# ---- TEXT: BBCode & text effects --------------------------
+Miko (joy): Hi there! I'm Miko, and this is a [b]bold[/b] text test.
+Miko (joy): [speed=0.02]I can speak slowly too...
+Miko (joy): And now I'm back to normal speed.
+
+Advisor (pl5): Remember, [color=red]colored text[/color] works as well.
+Advisor (pl5): [pause=1.0] ...and so do timed pauses.
+
+# ---- CONDITION: Variable-based branching ------------------
+if {coins} == 0:
+	Miko (doubt): I don't have any coins yet. Let's find some!
+	Advisor (doubt): We should look around carefully.
+else:
+	Miko (joy): Nice, I already have some coins!
+	Advisor (pl5): Good. That will come in handy.
+
+# ---- VARIABLE: Set a variable -----------------------------
+set {coins} = 10
+
+Miko (joy): [shake]Look![/shake] I just found 10 coins.
+
+# ---- LABEL: merchant_encounter ----------------------------
+label merchant_encounter
+
+join Merchant left
+
+Miko (neutral): A merchant appeared. Let's see what he has.
+Advisor (doubt): Be cautious, Miko. Don't reveal everything you carry.
+
+Merchant (happy): Welcome, traveler! Would you like to see my wares?
+
+# ---- CHOICE: Branching dialog -----------------------------
+- Yes, show me what you've got!
+	set {met_merchant} = true
+	Miko (joy): Absolutely, show me your best items!
+	Merchant (happy): Excellent choice! I have potions, scrolls, and enchanted blades.
+	Merchant (blink): That will be {10/15/20} gold coins, please!
+	set {coins} = -10
+	Miko (shock): Here you go! That was expensive...
+	Advisor (blink): Did you really have to spend all our coins?
+
+- Not right now, maybe later.
+	Miko (neutral): I'll come back when I have more gold.
+	Merchant (happy): Suit yourself. The door is always open.
+	Advisor (pl5): A wise decision.
+
+- Use the ancient key to barter. | [if {player_has_key}]
+	Miko (smile): I have this ancient key. Will you trade for it?
+	Merchant (surprise): [shake]A key from the old kingdom?![/shake] Take anything you want!
+	set {player_has_key} = false
+	Miko (joy): That was a great deal!
+	Advisor (surprise): You traded the key?! That was reckless...
+
+# ---- SIGNAL: Emit a custom signal -------------------------
+[signal arg=item_bought]
+
+Merchant (happy): Pleasure doing business with you!
+Miko (smile): Thanks, merchant!
+Advisor (pl5): Let's keep moving. We have ground to cover.
+
+# ---- WAIT: Timed pause (seconds) --------------------------
+[wait time="1.0"]
+
+Miko (neutral): Let's keep exploring.
+
+# ---- JUMP & LABEL: Navigation -----------------------------
+jump secret_room
+
+# ---- LABEL: farewell (unreachable via normal flow) --------
+label farewell
+Miko (smile): Goodbye for now!
+Advisor (pl5): Until next time.
+[end_timeline]
+
+# ---- LABEL: secret_room -----------------------------------
+label secret_room
+
+leave Merchant
+Miko (surprise): Hey, the merchant disappeared... and there's a hidden door here!
+Advisor (doubt): Careful, Miko. We don't know what's inside.
+Miko (neutral): You're right, but we have to check it out.
+Advisor (pl5): Very well. I'll follow your lead.
+
+# ---- CONDITION with ELSE ----------------------------------
+if {player_has_key}:
+	Miko (joy): Good thing we still have the ancient key. Let's open it!
+	Advisor (surprise): The key glows faintly as you approach.
+	Miko (smile): Here goes nothing...
+	[signal arg=door_opened]
+else:
+	Miko (anger): Darn, we used the key at the shop. How do we open this?
+	Advisor (pl5): Maybe we can find another way around.
+	Miko (doubt): I guess we'll have to search for another entrance.
+	Advisor (doubt): Patience. Every lock has its key.
+
+# ---- JUMP to farewell label -------------------------------
+Miko (smile): Well, that's the end of the test timeline!
+Advisor (pl5): A successful demonstration, I'd say.
+jump farewell
+# End